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How Your Heart Influences What You Perceive and Fear

Reprinted with permission from Quanta Magazine‘s Abstractions blog.

The heartbeat and other bodily processes play a surprising role in shaping perception and cognition.ManuMata / Shutterstock

We consider the brain the very center of who we are and what we do: ruler of our senses, master of our movements; generator of thought, keeper of memory. But the brain is also rooted in a body, and the connection between the two goes both ways. If certain internal receptors indicate hunger, for instance, we’re driven to eat; if they indicate cold, we dress more warmly.

However, decades of research have also shown that those sensations do much more than alert the brain to the body’s immediate concerns and needs. As the heart, lungs, gut and other organs transmit information to

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